I have a device that I'm building in quantity for someone, and it has a simple halfwave rectifier and switching reg to provide 5V to power the BBB. They power it with 24VAC.
I'm not sure what exactly is causing it, but they're having problems with the BBBs dying on them. I got one back today, and I get a single quick dim flash of the power LED if I plug in USB, or rapid flashing if I use the barrel jack. After seeing this post, I noticed that there's a burnt crater on the processor. I was originally thinking power problems, but now I'm starting to think IO misuse. These boards use primarily I2C, and the BBB is driving a couple of I2C peripherals for sensors and solenoid control. Additionally, I fanned out eight GPIO to connectors which are for future use for PWM to run light dimmers and switch inputs, but they're not supported yet. I just found out that they had the PWM lines hooked up, and I don't yet know what they had connected to them. On Thursday, July 4, 2013 10:38:46 AM UTC-4, Gerald wrote: > > You have blown the processor. Request an RMA. > > beagleboard.org/support/rma > > No fuses on the board. Plugging in the USB and DC supply is totally > acceptable and supported. > > Gerald > > > > On Thu, Jul 4, 2013 at 3:21 AM, Will Kostelecky > <[email protected]<javascript:> > > wrote: > >> Help! >> >> My BBB was working fine, great in fact, but not so much at the moment. >> When I plug it into a power source, be it a known good 5v supply that I >> have been using with it for weeks, or into either of two computers via USB, >> I get one dim little flash from the power LED and then NOTHING else. No >> other lights flash. If I hold down the power switch I will get another >> brief and dim flash after a couple of seconds. Again, no other LEDs light >> and nothing else happens. >> >> This started to happen when I plugged the BBB into a computer using a USB >> cable while it was still plugged into the 5V power source. Could this have >> fried something? Are there any poly fuses that might come back to life >> after a rest? >> >> Frustrating as I was making such good progress on my project! >> >> Will >> >> >> On Tuesday, 30 April 2013 15:23:23 UTC+1, Gerald wrote: >> >>> You are a pioneer! Columbus was not looking for America. But you are now >>> the Columbus of the power button! >>> >>> I am trying convince the SW folks to add support for the power button >>> but it is down the list somewhere. >>> >>> Gerald >>> >>> On Tuesday, April 30, 2013, Jason Stapels wrote: >>> >>>> An update for the curious. After some prodding from the >>>> all-power-Gerald, I was able to bring the board back to life again by... >>>> are you ready... holding down the POWER button. Which means I'm probably >>>> the biggest idiot ever!? I guess I expected the PWR led to be lit any time >>>> 5V was feeding the board, regardless of it's On/Off state. >>>> >>>> Certainly, in the dozen or so previous times I plugged the board in, >>>> just giving it power caused it to power on, so the idea of the POWER >>>> button >>>> actually being used to turn it on never occurred to me. If I could save >>>> face just a little here, I did actually press it a couple times before >>>> throwing in the towel, I just didn't consider holding it down for a few >>>> seconds. >>>> >>>> In embarrassed shame, >>>> ~ Jason >>>> >>>> On Tuesday, April 30, 2013 8:19:57 AM UTC-4, Jason Stapels wrote: >>>>> >>>>> Hi all, >>>>> >>>>> Just wanted to share my experience with my dead BBB. It's my first >>>>> experience with the Beagle line so it's possible I did something wrong >>>>> somewhere so I thought it would be a good idea to share my experiences in >>>>> case other newb's read this. Feel free to skip to the bottom for the >>>>> symptoms. >>>>> >>>>> -- Begin Background Info -- >>>>> >>>>> I was lucky enough to get my BBB almost right away from Digikey. I >>>>> immediately installed the drivers on my Mac and started playing around >>>>> with >>>>> it the first night. Unfortunately, the second night I couldn't get my Mac >>>>> to allocate an IP address through the USB to talk to it so I thought >>>>> maybe >>>>> I shouldn't have skipped that "update software" step. So next I >>>>> downloaded >>>>> the latest "flash eMMC" image, wrote it to an SD card and then went >>>>> through >>>>> the upgrade process. >>>>> >>>>> Here's where things went a little South. After the first attempt the >>>>> USR lights eventually went solid (presumably indicating the flashing >>>>> process was finished) but when I rebooted it without the SD card, the >>>>> power >>>>> light would come on but it wouldn't boot. After a couple repower attempts >>>>> I >>>>> decided to flash it again. This time, at some point during the flash >>>>> process, the board seemed to just lose power (all the LEDs were off). >>>>> Attempts to power the board resulted in the same as before, power light >>>>> comes on but no booting. >>>>> >>>>> So, my assumption was I messed up the SD card image. I >>>>> downloaded/reimaged the SD card again, went through the flash process and >>>>> this time it seemed to finish. Now when I powered on the board it >>>>> appeared >>>>> to boot up. However, I still couldn't get it to pick up an IP address >>>>> from >>>>> the Mac (after reinstalling both drivers and a couple reboots). I read >>>>> somewhere that someone had a similar issue and an update to Angstrom >>>>> solved >>>>> it. >>>>> >>>>> This time I plugged the board into my linux box and I was able to >>>>> access the running linux image (yay!). I immediately SSH'd in, and went >>>>> through the Angstrom upgrade (opkg update; opkg upgrade). The upgrade >>>>> took >>>>> awhile and seemed to have a few issues with the new kernel modules >>>>> (/lib/modules/blah didn't exist). I figured it was just a warning and >>>>> after >>>>> the upgrade finished I unplugged the board and plugged it back into my >>>>> Mac... >>>>> >>>>> -- End Background Info -- >>>>> >>>>> The power light came on... the USR lights all went solid for a couple >>>>> seconds... and then the board died. I can no longer seem to power the >>>>> board >>>>> up at all. I've tried multiple USB cables, multiple USB ports on multiple >>>>> machines, and even tried the DC jack with a 5v/2.2A supply. :( I >>>>> submitted >>>>> an RMA (although my board doesn't seem to have a serial number) because I >>>>> don't think I did anything wrong, but I'm a very sad panda regardless. >>>>> >>>>> Any ideas? Anything I should check? >>>>> >>>>> ~ Jason >>>>> >>>> -- >>>> For more options, visit http://beagleboard.org/discuss >>>> --- >>>> You received this message because you are subscribed to the Google >>>> Groups "BeagleBoard" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to [email protected]. >>>> For more options, visit https://groups.google.com/groups/opt_out. >>>> >>>> >>>> >>> >>> >>> -- >>> Gerald >>> >>> [email protected] >>> [email protected] >>> http://beagleboard.org/ >>> http://circuitco.com/support/ >>> >>> -- >> For more options, visit http://beagleboard.org/discuss >> --- >> You received this message because you are subscribed to the Google Groups >> "BeagleBoard" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected] <javascript:>. >> For more options, visit https://groups.google.com/groups/opt_out. >> >> >> > > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
